using System;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.InteropServices;
using System.Text;
using System.Threading.Tasks;
using System.Threading;

namespace Tps_LQ_Transmitter.com
{
    /// <summary>
    /// 计算机后面板GPIO的控制类，用于控制八路一分二射频开关，该开关主要作用是切换衰减器与陷波器，ON为陷波器接通，OFF为衰减器接通。
    /// 启用端口2，4，6，8，10，12，14，16八个端口，其他未使用。
    /// </summary>
    public class PcGpio
    {
        [DllImport("inpout32.dll", CallingConvention = CallingConvention.Winapi)]
        public extern static void Out32(ushort add, ushort dat);
        [DllImport("inpout32.dll", CallingConvention = CallingConvention.Winapi)]
        public extern static ushort Inp32(ushort add);

        /// <summary>
        /// 初始化PC机后方所有的端口设置为输出端口
        /// </summary>
        public void InitSetOut()
        {
            ushort dwPortVal;
            Out32(0xF040, (0xFF));
            Out32((0xF043), (0x06));   //GPIO1 ~GPIO8
            Out32((0xF044), (0x40));   //address
            Out32((0xF045), (0x00));   // 0 = Output
            Out32((0xF042), (0x48));
            for (int i = 0; i < 100; i++)
            {
                dwPortVal = Inp32(0xF040);
                if (dwPortVal == 0x42){break;}  else{Thread.Sleep(1);}
            }

            Out32(0xF040, (0xFF));
            Out32((0xF043), (0x07));   //GPIO9 ~GPIO16
            Out32((0xF044), (0x40));   //address
            Out32((0xF045), (0x00));   // 0 = Output
            Out32((0xF042), (0x48));
            for (int i = 0; i < 100; i++)
            {
                dwPortVal = Inp32(0xF040);
                if (dwPortVal == 0x42) { break; } else { Thread.Sleep(1); }
            }
        }

        /// <summary>
        /// 向端口写入高低电平信号
        /// </summary>
        /// <param name="dat">dat[0]为GPIO1-8,dat[1]为GPIO9-16</param>
        public void WriteOut(ushort[] dat)
        {
            ushort dwPortVal;
            Out32(0xF040, (0xFF));
            Out32((0xF043), (0x02));   //GPIO1 ~GPIO8
            Out32((0xF044), (0x40));   //address
            Out32((0xF045), (dat[0]));   // 0 = Output
            Out32((0xF042), (0x48));
            for (int i = 0; i < 100; i++)
            {
                dwPortVal = Inp32(0xF040);
                if (dwPortVal == 0x42) { break; } else { Thread.Sleep(1); }
            }

            Out32(0xF040, (0xFF));
            Out32((0xF043), (0x03));   //GPIO9 ~GPIO16
            Out32((0xF044), (0x40));   //address
            Out32((0xF045), (dat[1]));   // 0 = Output
            Out32((0xF042), (0x48));
            for (int i = 0; i < 100; i++)
            {
                dwPortVal = Inp32(0xF040);
                if (dwPortVal == 0x42) { break; } else { Thread.Sleep(1); }
            }
        }

        /// <summary>
        /// 开关控制，通道号为0则开关全部端口，1-8则为有效闭合其中一个“一分二”开关
        /// </summary>
        /// <param name="ch">通道号</param>
        public void SwitchControl(int ch)
        {
            ushort[] dat = new ushort[2];
            int chPlay = ch;
            switch (ch)
            {
                case 1:
                    chPlay = 7;
                    break;
                case 2:
                    chPlay = 5;
                    break;
                case 3:
                    chPlay = 3;
                    break;
                case 4:
                    chPlay = 1;
                    break;
                case 5:
                    chPlay = 8;
                    break;
                case 6:
                    chPlay = 6;
                    break;
                case 7:
                    chPlay = 4;
                    break;
                case 8:
                    chPlay = 2;
                    break;
                default:
                    chPlay = ch;
                    break;
            }
            switch (chPlay)
            {
                case 1:
                    dat[0] = 0x02;
                    dat[1] = 0x00;
                    break;
                case 2:
                    dat[0] = 0x08;
                    dat[1] = 0x00;
                    break;
                case 3:
                    dat[0] = 0x20;
                    dat[1] = 0x00;
                    break;
                case 4:
                    dat[0] = 0x80;
                    dat[1] = 0x00;
                    break;
                case 5:
                    dat[0] = 0x00;
                    dat[1] = 0x02;
                    break;
                case 6:
                    dat[0] = 0x00;
                    dat[1] = 0x08;
                    break;
                case 7:
                    dat[0] = 0x00;
                    dat[1] = 0x20;
                    break;
                case 8:
                    dat[0] = 0x00;
                    dat[1] = 0x80;
                    break;
                default:
                    dat[0] = 0x00;
                    dat[1] = 0x00;
                    break;
            }
            WriteOut(dat);
        }
        /// <summary>
        /// 8路全切换至衰减器通道（一分二射频开关全OFF）
        /// </summary>
        public void AllSwitchAttenuator()
        {
            ushort[] dat = { 0x00,0x00 };
            WriteOut(dat);
        }
        /// <summary>
        /// 8路全切换至陷波器通道（一分二射频开关全ON）
        /// </summary>
        public void AllSwitchBandstopft()
        {
            ushort[] dat = { 0xFF, 0xFF };
            WriteOut(dat);
        }
    }
}